mirror of
https://github.com/langbot-app/LangBot.git
synced 2026-06-02 20:14:36 +00:00
463 lines
16 KiB
Python
463 lines
16 KiB
Python
"""
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Unit tests for ChatMessageHandler - REAL imports.
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Tests the actual ChatMessageHandler class from production code.
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Uses tests.utils.import_isolation to break circular import chain safely.
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"""
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from __future__ import annotations
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import pytest
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from unittest.mock import AsyncMock, Mock
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from tests.factories import FakeApp
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DEFAULT_RUNNER_ID = 'plugin:langbot/local-agent/default'
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def runner_pipeline_config(output_misc: dict) -> dict:
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return {
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'output': {'misc': output_misc},
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'ai': {
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'runner': {'id': DEFAULT_RUNNER_ID},
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'runner_config': {
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DEFAULT_RUNNER_ID: {
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'prompt': [{'role': 'system', 'content': 'default'}],
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'model': {'primary': 'test', 'fallbacks': []},
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},
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},
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},
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}
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# ============== FIXTURE USING IMPORT ISOLATION UTILITY ==============
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@pytest.fixture(scope='module')
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def mock_circular_import_chain():
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"""
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Break circular import chain using isolated_sys_modules.
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Chain: handler → core.app → pipeline.controller → http_controller → groups/plugins → taskmgr
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Uses tests.utils.import_isolation for safe, reversible sys.modules manipulation.
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"""
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from tests.utils.import_isolation import (
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isolated_sys_modules,
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make_pipeline_handler_import_mocks,
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get_handler_modules_to_clear,
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)
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from langbot_plugin.api.entities.builtin.provider.message import Message
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mocks = make_pipeline_handler_import_mocks()
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# Create a default runner that yields a simple response
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class DefaultRunner:
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name = 'local-agent'
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def __init__(self, app, config):
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self.app = app
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self.config = config
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async def run(self, query):
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yield Message(role='assistant', content='fake response')
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mocks['langbot.pkg.provider.runner'].preregistered_runners = [DefaultRunner]
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clear = get_handler_modules_to_clear('chat')
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with isolated_sys_modules(mocks=mocks, clear=clear):
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yield
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@pytest.fixture
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def fake_app():
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"""Create FakeApp instance."""
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app = FakeApp()
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class ProviderRunnerBackedOrchestrator:
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async def run_from_query(self, query):
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import sys
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runner_class = sys.modules['langbot.pkg.provider.runner'].preregistered_runners[0]
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runner = runner_class(app, {})
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async for result in runner.run(query):
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yield result
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def resolve_runner_id_for_telemetry(self, query):
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return DEFAULT_RUNNER_ID
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app.agent_run_orchestrator = ProviderRunnerBackedOrchestrator()
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return app
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@pytest.fixture
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def mock_event_ctx():
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"""Create mock event context."""
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ctx = Mock()
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ctx.is_prevented_default = Mock(return_value=False)
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ctx.event = Mock()
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ctx.event.user_message_alter = None
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ctx.event.reply_message_chain = None
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return ctx
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@pytest.fixture
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def set_runner():
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"""Factory fixture to set a custom runner for tests."""
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def _set_runner(runner_class):
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import sys
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sys.modules['langbot.pkg.provider.runner'].preregistered_runners = [runner_class]
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return _set_runner
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# ============== CACHED LAZY IMPORTS ==============
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_chat_handler_module = None
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_entities_module = None
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def get_chat_handler():
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"""Import ChatMessageHandler after circular import chain is mocked."""
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global _chat_handler_module
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if _chat_handler_module is None:
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from importlib import import_module
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_chat_handler_module = import_module('langbot.pkg.pipeline.process.handlers.chat')
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return _chat_handler_module
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def get_entities():
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"""Import pipeline entities - uses real module."""
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global _entities_module
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if _entities_module is None:
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from importlib import import_module
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_entities_module = import_module('langbot.pkg.pipeline.entities')
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return _entities_module
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# ============== REAL ChatMessageHandler Tests ==============
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@pytest.mark.usefixtures('mock_circular_import_chain')
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class TestChatMessageHandlerReal:
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"""Tests for real ChatMessageHandler class."""
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@pytest.mark.asyncio
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async def test_real_import_works(self):
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"""Verify we can import the real handler class."""
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chat = get_chat_handler()
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assert hasattr(chat, 'ChatMessageHandler')
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handler_cls = chat.ChatMessageHandler
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assert handler_cls.__name__ == 'ChatMessageHandler'
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@pytest.mark.asyncio
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async def test_handler_creation(self, fake_app):
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"""ChatMessageHandler can be instantiated."""
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chat = get_chat_handler()
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handler = chat.ChatMessageHandler(fake_app)
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assert handler.ap is fake_app
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@pytest.mark.asyncio
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async def test_prevent_default_without_reply_interrupts(self, fake_app, mock_event_ctx):
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"""prevent_default without reply chain yields INTERRUPT."""
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from tests.factories import text_query
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chat = get_chat_handler()
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entities = get_entities()
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mock_event_ctx.is_prevented_default.return_value = True
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mock_event_ctx.event.reply_message_chain = None
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fake_app.plugin_connector.emit_event = AsyncMock(return_value=mock_event_ctx)
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handler = chat.ChatMessageHandler(fake_app)
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query = text_query('hello')
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results = []
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async for result in handler.handle(query):
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results.append(result)
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assert len(results) == 1
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assert results[0].result_type == entities.ResultType.INTERRUPT
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@pytest.mark.asyncio
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async def test_prevent_default_with_reply_continues(self, fake_app, mock_event_ctx):
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"""prevent_default with reply yields CONTINUE and updates resp_messages."""
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from tests.factories import text_query, text_chain
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chat = get_chat_handler()
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entities = get_entities()
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reply_chain = text_chain('plugin reply')
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mock_event_ctx.is_prevented_default.return_value = True
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mock_event_ctx.event.reply_message_chain = reply_chain
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fake_app.plugin_connector.emit_event = AsyncMock(return_value=mock_event_ctx)
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handler = chat.ChatMessageHandler(fake_app)
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query = text_query('hello')
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query.resp_messages = []
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results = []
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async for result in handler.handle(query):
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results.append(result)
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assert len(results) == 1
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assert results[0].result_type == entities.ResultType.CONTINUE
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assert len(query.resp_messages) == 1
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assert query.resp_messages[0] == reply_chain
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@pytest.mark.asyncio
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async def test_user_message_alter_string(self, fake_app, mock_event_ctx, set_runner):
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"""user_message_alter as string updates query.user_message."""
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from tests.factories import text_query
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from langbot_plugin.api.entities.builtin.provider.message import Message
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chat = get_chat_handler()
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mock_event_ctx.is_prevented_default.return_value = False
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mock_event_ctx.event.user_message_alter = 'altered text'
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fake_app.plugin_connector.emit_event = AsyncMock(return_value=mock_event_ctx)
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query = text_query('original')
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query.adapter = Mock()
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query.adapter.is_stream_output_supported = AsyncMock(return_value=False)
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query.user_message = Message(role='user', content=[])
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class QuickRunner:
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name = 'local-agent'
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def __init__(self, app, config):
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self.app = app
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self.config = config
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async def run(self, query):
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yield Message(role='assistant', content='ok')
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set_runner(QuickRunner)
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handler = chat.ChatMessageHandler(fake_app)
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results = []
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async for result in handler.handle(query):
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results.append(result)
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assert query.user_message.content is not None
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@pytest.mark.asyncio
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async def test_adapter_without_stream_method_defaults_non_stream(self, fake_app, mock_event_ctx, set_runner):
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"""Adapter without is_stream_output_supported defaults to non-stream."""
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from tests.factories import text_query
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from langbot_plugin.api.entities.builtin.provider.message import Message, ContentElement
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chat = get_chat_handler()
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mock_event_ctx.is_prevented_default.return_value = False
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mock_event_ctx.event.user_message_alter = None
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fake_app.plugin_connector.emit_event = AsyncMock(return_value=mock_event_ctx)
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query = text_query('test')
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query.adapter = Mock(spec=[])
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query.user_message = Message(role='user', content=[ContentElement.from_text('test')])
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class SingleRunner:
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name = 'local-agent'
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def __init__(self, app, config):
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self.app = app
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self.config = config
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async def run(self, query):
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yield Message(role='assistant', content='response')
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set_runner(SingleRunner)
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handler = chat.ChatMessageHandler(fake_app)
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results = []
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async for result in handler.handle(query):
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results.append(result)
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assert len(results) >= 1
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@pytest.mark.usefixtures('mock_circular_import_chain')
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class TestChatHandlerStreaming:
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"""Tests for streaming behavior."""
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@pytest.mark.asyncio
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async def test_streaming_chunks_collected(self, fake_app, mock_event_ctx, set_runner):
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"""Streaming produces multiple results."""
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from tests.factories import text_query
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from langbot_plugin.api.entities.builtin.provider.message import Message, ContentElement, MessageChunk
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chat = get_chat_handler()
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mock_event_ctx.is_prevented_default.return_value = False
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fake_app.plugin_connector.emit_event = AsyncMock(return_value=mock_event_ctx)
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query = text_query('stream test')
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query.adapter = Mock()
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query.adapter.is_stream_output_supported = AsyncMock(return_value=True)
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query.adapter.create_message_card = AsyncMock()
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query.user_message = Message(role='user', content=[ContentElement.from_text('test')])
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class StreamRunner:
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name = 'local-agent'
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def __init__(self, app, config):
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self.app = app
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self.config = config
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async def run(self, query):
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yield MessageChunk(role='assistant', content='Hello', is_final=False)
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yield MessageChunk(role='assistant', content=' World', is_final=True)
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set_runner(StreamRunner)
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handler = chat.ChatMessageHandler(fake_app)
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results = []
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async for result in handler.handle(query):
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results.append(result)
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assert len(results) >= 1
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@pytest.mark.usefixtures('mock_circular_import_chain')
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class TestChatHandlerExceptions:
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"""Tests for exception handling."""
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@pytest.mark.asyncio
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async def test_runner_exception_yields_interrupt(self, fake_app, mock_event_ctx, set_runner):
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"""Runner exception yields INTERRUPT with error notices."""
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from tests.factories import text_query
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from langbot_plugin.api.entities.builtin.provider.message import Message
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chat = get_chat_handler()
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entities = get_entities()
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mock_event_ctx.is_prevented_default.return_value = False
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fake_app.plugin_connector.emit_event = AsyncMock(return_value=mock_event_ctx)
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query = text_query('fail test')
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query.adapter = Mock()
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query.adapter.is_stream_output_supported = AsyncMock(return_value=False)
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query.user_message = Message(role='user', content=[])
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query.pipeline_config = runner_pipeline_config(
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{'exception-handling': 'show-hint', 'failure-hint': 'Request failed.'}
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)
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class FailingRunner:
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name = 'local-agent'
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def __init__(self, app, config):
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self.app = app
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self.config = config
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async def run(self, query):
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raise ValueError('API error')
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yield
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set_runner(FailingRunner)
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handler = chat.ChatMessageHandler(fake_app)
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results = []
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async for result in handler.handle(query):
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results.append(result)
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assert len(results) == 1
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assert results[0].result_type == entities.ResultType.INTERRUPT
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assert results[0].user_notice == 'Request failed.'
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assert results[0].error_notice is not None
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@pytest.mark.asyncio
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async def test_exception_show_error_mode(self, fake_app, mock_event_ctx, set_runner):
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"""show-error mode shows actual exception."""
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from tests.factories import text_query
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from langbot_plugin.api.entities.builtin.provider.message import Message
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chat = get_chat_handler()
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mock_event_ctx.is_prevented_default.return_value = False
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fake_app.plugin_connector.emit_event = AsyncMock(return_value=mock_event_ctx)
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query = text_query('error test')
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query.adapter = Mock()
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query.adapter.is_stream_output_supported = AsyncMock(return_value=False)
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query.user_message = Message(role='user', content=[])
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query.pipeline_config = runner_pipeline_config({'exception-handling': 'show-error'})
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class ErrorRunner:
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name = 'local-agent'
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def __init__(self, app, config):
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self.app = app
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self.config = config
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async def run(self, query):
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raise ValueError('Custom error')
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yield
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set_runner(ErrorRunner)
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handler = chat.ChatMessageHandler(fake_app)
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results = []
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async for result in handler.handle(query):
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results.append(result)
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assert results[0].user_notice == 'Custom error'
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@pytest.mark.asyncio
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async def test_exception_hide_mode(self, fake_app, mock_event_ctx, set_runner):
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"""hide mode shows no user notice."""
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from tests.factories import text_query
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from langbot_plugin.api.entities.builtin.provider.message import Message
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chat = get_chat_handler()
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mock_event_ctx.is_prevented_default.return_value = False
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fake_app.plugin_connector.emit_event = AsyncMock(return_value=mock_event_ctx)
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query = text_query('hide test')
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query.adapter = Mock()
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query.adapter.is_stream_output_supported = AsyncMock(return_value=False)
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query.user_message = Message(role='user', content=[])
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query.pipeline_config = runner_pipeline_config({'exception-handling': 'hide'})
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class HideErrorRunner:
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name = 'local-agent'
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def __init__(self, app, config):
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self.app = app
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self.config = config
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async def run(self, query):
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raise RuntimeError('hidden')
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yield
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set_runner(HideErrorRunner)
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handler = chat.ChatMessageHandler(fake_app)
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results = []
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async for result in handler.handle(query):
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results.append(result)
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assert results[0].user_notice is None
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@pytest.mark.usefixtures('mock_circular_import_chain')
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class TestChatHandlerHelper:
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"""Tests for helper methods."""
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def test_cut_str_short(self, fake_app):
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"""cut_str returns short string unchanged."""
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chat = get_chat_handler()
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handler = chat.ChatMessageHandler(fake_app)
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result = handler.cut_str('short text')
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assert result == 'short text'
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def test_cut_str_long(self, fake_app):
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"""cut_str truncates long string."""
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chat = get_chat_handler()
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handler = chat.ChatMessageHandler(fake_app)
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result = handler.cut_str('this is a very long string that exceeds twenty characters')
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assert '...' in result
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assert len(result) <= 23
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def test_cut_str_multiline(self, fake_app):
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"""cut_str truncates multiline string."""
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chat = get_chat_handler()
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handler = chat.ChatMessageHandler(fake_app)
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result = handler.cut_str('first line\nsecond line')
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assert '...' in result
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